key viewer
diff --git a/src/cert-tree-model.hpp b/src/cert-tree-model.hpp
new file mode 100644
index 0000000..38693ad
--- /dev/null
+++ b/src/cert-tree-model.hpp
@@ -0,0 +1,43 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014, Regents of the University of California,
+ *
+ * This file is part of NFD Control Center. See AUTHORS.md for complete list of NFD
+ * authors and contributors.
+ *
+ * NFD Control Center is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD Control Center is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with NFD
+ * Control Center, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NDN_NCC_CERT_TREE_MODEL_HPP
+#define NDN_NCC_CERT_TREE_MODEL_HPP
+
+#include <QStandardItemModel>
+
+namespace ndn {
+namespace ncc {
+
+class CertTreeModel : public QStandardItemModel
+{
+ Q_OBJECT
+
+public:
+ explicit
+ CertTreeModel(int row, int column, QObject* parent = 0);
+
+ QVariant
+ data(const QModelIndex& index, int role) const Q_DECL_OVERRIDE;
+};
+
+} // namespace ncc
+} // namespace ndn
+
+#endif // NDN_NCC_CERT_TREE_MODEL_HPP